A New Pea $20.00 Inside Message Blank Inside Packages of Heartstrings® cards are shrink-wrapped and sold in sets of 10 cards with envelopes. The actual card size is 4 1/4" x 5 1/2". A New Pea quantity Add to cart SKU: 23. Categories: Baby - Parenting, Gardening. Related Products I Only Have Irises for You $20.00 Whine Bottles $20.00 A Big Addition $20.00 Give Peas a Chance $20.00